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  1. DHT IMD
  2. How to calculate OPT transformer windings
  3. Newbie Questions
  4. Building a Harmonic Distortion Generator
  5. plate curves and max ratings questions
  6. Heater-cathode DC conduction resistance
  7. EL 84 Capacitor Equivalent
  8. How do they get away with this?
  9. well-loved Sherwood "popping" prob mouse pee
  10. Tube Newb: 12sn7 and 12sl7 interchangeable?
  11. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  12. sonic frontiers sfm-75
  13. Chinese tube amp mods?
  14. PSU for JE Labs Simple 45/2A3
  15. frustrated ,Bought a 845 NOS - springs are discconnected need help
  16. Running water sound in amp
  17. Peerless 16458 output transformers
  18. Noisy high-gain preamplifier
  19. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  20. 2A3 single plate RCA/Cunningham tube prices
  21. output transformer power rating
  22. Rectifier Foward Voltage?
  23. Help With 6Y6 amp
  24. What are 12AT7/ECC81 power drivers ?
  25. Help with these Russian GU50 tube amplifier
  26. Eico ST-70 Supermods
  27. Mullard PZ30, how's its Peak Inverse Voltage?
  28. Optical compressor project
  29. 12AU7 in cascode configuration
  30. Bad tube in old record player?
  31. check this out glas-fiber cartridge
  32. cathode caps
  33. Aikido HV PSU
  34. Distance between 6N23P and a cap?
  35. solid and strand wire in amp
  36. Phillips Music Sudio
  37. LTPI Grid stopper value affect on harmonics
  38. WTF. What's going on here.
  39. 7-pin pcb mount socket with shield?
  40. SIMPLE remote volume control with alps motorized pot
  41. Hybrid Partial Feedback SE Amplifier
  42. HV +B Connector
  43. Eico experts needed: PEC in 2050 driver stage bad
  44. Best sounding linestage/buffer topology?
  45. Using ECC88
  46. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  47. EL34 cathode bias PA
  48. Tube Amp Art
  49. Quick OT Question
  50. Power Transformer
  51. ampex 354? some questions
  52. Good power Filter Capacitors
  53. Fisher 101d blow fuse
  54. Valco Model 1200 help
  55. Jolida 502A lost output...?
  56. Codename "Tapyrus", my ongoing DIY headphone amp
  57. RIAA preamp with DHTs
  58. Dynaco Mark VI feedback values
  59. Eagle PCB
  60. Ode to Tube Rollers
  61. switching tubes: good or bad idea?
  62. COnn Organ Amp DI266 Info 12v6GT tubes
  63. Please help me figure out why my plate voltage is too high here
  64. Yaqin MC10L Question for the Guru's
  65. PP PSU: How much ripple is too much ripple?
  66. Bypass caps in choke PS
  67. Grounded Grid TRANSCENDENT line stage
  68. Battery Powered Tube Amp
  69. 5Z4PJ 6N2J
  70. Almost there! opinions are welcomed(6C33SET)
  71. Speaker impedance and amp matching?
  72. r core or toroidal output trafo for dynaco st70
  73. Heathkit Returns
  74. How to get started
  75. WANTED: schematic for Eico 2050 Classic Series
  76. winding an output transformer
  77. 12AX7 vacuum tube pre-amp?
  78. motor 'defeat' switch for echoplex/etc
  79. Audionote kit L4 and L6
  80. class a audio amplifier 5w with ic ne5532
  81. Fate of my Heathkit W7-M amplifiers
  82. Trying to get my B&K 500 up and running.
  83. Tubelab simple SE ideas
  84. Newcomb E-10B Amplifer
  85. Telefunken RV218 power triode
  86. Crowhurst High Power vs Low Power Amplifiers
  87. Duncan amps PSU designer II help
  88. damper diodes
  89. EL12N in JCM800 clone
  90. Amp design exercise, mentorship needed...
  91. Need help with series filament 25l6GT amp
  92. Dynakit Mark IV Oscillation
  93. Telefunken C3M data
  94. Can a tube guru help with nu>lambda conversions?
  95. plate dissipation vs brand
  96. Solid-state replacements for PAS2/3 rectifiers?
  97. first integrated amp
  98. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  99. st70A mod.kit
  100. Grampian 600u
  101. Suggest amp to drive mangnapan SMGa/MMG
  102. Valve DI box
  103. Yaqin Tube Amplifier
  104. Jensen JT-11P-1 on tube amp input
  105. Amperex PQ 6922 code decifering?
  106. 12ax7 driving a DHT out, why not?
  107. unknown Rogers Pre Power
  108. Mic pre question
  109. power tube power scaler
  110. Tube Rectifier with transformer without Center tap
  111. Can I use this stuff (does it have any value?)
  112. Full regulated power supply for 12au7(preamp)
  113. 6C33 OTL Circlotron
  114. Ammeter connection for Tubelab SE
  115. Unknown output transformer
  116. Building a tube pre/amp copy (6V6)
  117. 6922 pin i.d.
  118. KT88 Push Pull Amp using transistor driver stage
  119. 45 DHT HT Supply oscillating - help!
  120. exceeding plate voltage of the output tube
  121. Fisher 101D
  122. Tubes and Eagle3D
  123. Looking for old amp info
  124. Restoring an old tube amp
  125. Noob Tube Preamp Finished Kit Transformer HOT!
  126. the tv underrated tubes
  127. Headphone Amp
  128. What is needed to drive 86db speakers and sound *good*?
  129. ef86 - plate voltage
  130. Output signal distortion
  131. Minimum Acceptable Gm
  132. Anyone have experience with the 6SD7GT tube ?
  133. Identifying an ultralinear OPT
  134. A good sounding EL34 PP sch please
  135. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  136. ST-35 First Build
  137. Identifying EL34 tube?
  138. Solid state relais in stean of standby swtich
  139. $75 tube amp kit on eBay???
  140. Power supply RC (ohm's law) question -NEWBIE ALERT
  141. variable power control
  142. reccommend a voltage doubler for bias?
  143. Point to Point build tips
  144. I need some fairly specific capacitors types, like polyester or silva mica.
  145. ecf82 pentode instead of ef86
  146. K-12G vs. K-502
  147. eq in a tiny Directly Heated Cathode amp
  148. Anyone ever try 6C33C SE with Aikido drive?
  149. Help with 1:2 line level input Tx's
  150. 112a preamp need comment please
  151. Excellent (Modified) Williamson Treatise
  152. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  153. Chicago BO-14 100w amp
  154. ef861 - guitar preamp
  155. volume pot question, help.
  156. Simple B+ delay circuit for tube power amp?
  157. Dynacord Super 61, 62 spares request
  158. My small tube does it work?
  159. Approaching the best primary impedance on low or high side?
  160. CT Trafo and floating psu for circlotron?
  161. Unknown tube, need help to identify!
  162. 6L6 guidance needed
  163. Output Power Question
  164. Can the 7AK7 computer tube work as audio output tube ?
  165. Burned in Power Tubes?
  166. Driver Match for K-12G TubeAmp
  167. KT90 to KT88 with autobias
  168. SRPP DC working condition for Rk1=2Rk2
  169. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  170. the 'sound' of a CF
  171. Hickok I-177B tester help!
  172. Illinois Capacitor or Cornell_Dubilier
  173. Found iron recycling - what possible uses?
  174. Class AB PP - is it any good ?
  175. Stereo to mono by paralleling outputs?
  176. BOX in the making
  177. How about paralleling output tubes
  178. Are they basically Borbely hybrid circuitry?
  179. Service Life at Low Plate Current
  180. Sophia Electric SE Transformers for 813 "Super Schade"
  181. 10W suitcase amp
  182. PP OT made of 2 transformers
  183. If I change B+ do I have to change the circuit?
  184. PhonoDude
  185. Lafayette Phono/Reverb /Center channel amp
  186. Seller recommendation needed.
  187. Jeffrey's Super Circlotron (hybrid)
  188. Request for obscure heater specs
  189. Jolida JD1501RC Service Manual / Schematic
  190. 80W amp with a pair of EL34
  191. Epiphone Valve Junior to HiFi Conversion
  192. Serious Distortion on my DIY Toccata Phono Preamp
  193. Hickok 539b switch settings for 6SL7
  194. help me designing parallel SE guitar amp with 12at7 as power tube
  195. Voltage Change9115v/230v) of Audio Research amplifiers
  196. HF oscillation with no load, but only on one channel.
  197. Tube innards
  198. Peavey valveking 112 lead (distortion) channel doesn't work
  199. Looking for a tube amp
  200. What happens If I use too weak output transformer?
  201. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  202. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  203. Single Ended EL84 B+
  204. Looking for some PSU advice ...
  205. Electronic transformer filament supply
  206. Which Salas HV shunt regulator should I choose?
  207. Traced an old valve with no specs - thoughts please
  208. Resistor socket?
  209. Dynaco PAS 3X PSU mod
  210. Best sounding 500v. electrolytics
  211. CCS's for CCD line amp?
  212. tube life
  213. For tube amps w/ high output Z - Parallel R cross spkr?
  214. High and low impedance output preamps
  215. LTspice and simulating tube circuits?
  216. Cheap & Well Made Chinese SE EL34 Amp
  217. Heathkit transformer replacement...
  218. Integrated amp will not turn on
  219. EL34, Claus Byrith amplifier, mains noise problem
  220. Need a proposal for a stereo amp
  221. 12AT7 Headphone amp
  222. 6l6/12ax7 schematics please
  223. Hybrid bridge with jfet OS
  224. Please allow me to introduce myselft
  225. Chassis Source
  226. Is my 6L6 amp damaged from EL34's
  227. VISHAY VTA 55 Bulk Metal Foil Resistors?
  228. High-Voltage Power for 6 stage pedal
  229. 10 megaohms??
  230. E180F V EF184
  231. help on gain calculation with transformer for SE tube
  232. Working with constant current charts
  233. Hum and noise in small amp
  234. My project (6c33SET)
  235. EZ260A Grommes 260A Project
  236. 18A5 sound fine in triode mode ?
  237. 6GF5 sound fine in triode mode ?
  238. Muddy 6V6 Power Amp?
  239. GM 70 Schematic needed!
  240. tube simulatie models.
  241. building vacuum tubes... some questons
  242. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  243. Fixed bias on small signal pentode
  244. Buffer preamplifier
  245. 7027a testing
  246. decade bank values for a plate current tester
  247. anyone know the dimensions of a dynakit st-70 pcb?
  248. Help on designing full DHT SET power amplifier
  249. dc coupled volume pot value
  250. 20W OTL with 6N5P, Opinions...

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